ORGANIC ACIDS OF ASMOL

Based on the curves of pH- metric titration of the asmol used for anticorrosive protection of oil and gas pipelines, isopropanol solution of KOH in toluene – isopropanol mixture established the presence of two jumps pH, which indicates the presence of both strong and weak acids. Acid number of asmol on strong acids made 28.9 mg KOH/1g on weak 7.2 mg KOH/1g. Extraction of polar components of an asmol by water is carried out and the IR spectrums of the nonpolar and water phases are investigated. It is established that the nonpolar phase of an asmol is presented by oil hydrocarbons with a lowered content of aromatic components of the feedstock. The polar part of an asmol, passing at extraction into a water phase is characterized by the presence of a wide absorption band in the area 3300 – 3600 cm-1 with a maximum at 3420 cm-1. The strongest absorption band in the spectrum of the water extract phase located at 1200 cm-1. There are also two absorption bands corresponding to maxima at 1020 cm-1 and 1050 cm-1 and also an absorption band of medium intensity at 600 cm-1 and a weak at 935 cm-1. Thus, at synthesis of an asmol sulfonation heavy oil residues sulfuric acid, strong acids can be identified as sulfonic acid and weak as carbonic acids and phenols. Polar groups in the asmol are also hydroxyl groups as alcohols, carbonyl groups of aldehydes and ketones, SO2 group in the sulfone, which can be a part of the molecules of strong and weak acids, and also to be functional groups of neutral resins and asphaltenes. The received results allow explaining the formation of multibarrier anticorrosive protection of steel surface with materials based on asmol.